3Com 3C13755-US - Router 5642 Installation Manual page 31

Figure 29 Front Panel of the 1-Port Fractional T1 SIC
Table 24 lists status descriptions of the 1-Port Fractional T1 SIC LEDs.
Table 24 Status Descriptions of the 1-Port Fractional T1 SIC LEDs
LINK
ACT
Cables The 1-Port Fractional T1 SIC port cable is a 100-ohm standard shielded network
cable. Both ends have RJ-45 connectors.
You must order the cable you need from 3Com when you order the interface card.
To prevent damage to your router and to avoid voiding your warranty, use only the
appropriate cable offered by 3Com.
Figure 30 illustrates a T1 cable.
Figure 30 T1 Cable
Identify the mark on the interface while connecting to avoid misplugging the
connector into other interfaces and damaging the interface card or the router
host.
When the T1 cable is used outdoors, 3Com recommends that you install a
lightning arrester on the input end of the cable to minimize the risk of lightning
damage.
To connect the T1 cable:
1 Power off the router.
2 Insert one end of the T1 cable into the RJ45 connector of the 1-Port Fractional T1
SIC.
3 Connect the other end of the T1 cable into the relevant device.
4 After the power is turned on, check the LED SLOT1 or SLOT2 on the front panel of
the router. If the LED is green, the SIC has passed the POST and can operate
normally. If the LED is off, The POST failed and you should contact your Service
representative.
1-Port Fractional T1 SIC
Off: The link is not connected.
Green: The link is connected and frame
synchronous signals can be received.
Off: No data is being transmitted.
Flashing green: Data is being transmitted.
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